noun [抽象名词]（尤指某种坏事情的）开始，发作；军事攻击
Her life was finally extinguished by the onset of liver complaint.
她的生命之火终因肝病发作而被掐灭了。
on + set(放) → 放在…上 → 发作， 开始
单词造句:
- 网友用“Onset”造句精选
- "If this test could predict the onset of GVHD before the rash develops, it could be extremely valuable, " he says. 他说：“如果这种检测能够在皮疹显现之前预测移植物抗宿主病的发病，那将是非常有价值的。”
- In the 1967 European outbreak, a non-itchy rash was a feature noted in most patients between 2 and 7 days after symptom onset. 在1967年欧洲的疾病爆发中，大多数患者在症状发作后2至7天出现非瘙痒性皮疹。